1Thomas Jefferson’s Account with Joseph Milligan, [8–10 March 1809] (Jefferson Papers)
Malthus, Thomas Robert; An Essay on the principle of population [index entry]
2Samuel R. Demaree to Thomas Jefferson, 13 February 1814 (Jefferson Papers)
Malthus, Thomas Robert; An Essay on the principle of population [index entry]
3Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 18 August 1816 (Jefferson Papers)
Malthus, Thomas Robert; An Essay on the principle of population [index entry]
4Destutt de Tracy to Thomas Jefferson, 11 April 1818 (Jefferson Papers)
Malthus, Thomas Robert; An Essay on the principle of population [index entry]
5Joseph Milligan to Thomas Jefferson, 18 January 1819 (Jefferson Papers)
Malthus, Thomas Robert; An Essay on the principle of population [index entry]